Pronunciation: (self'pru-peld', self"-), [key]
1. propelled by itself.
2. (of a vehicle) propelled by its own engine, motor, or the like, rather than drawn or pushed by a horse, locomotive, etc.
3. (of a gun or a rocket launcher) having a vehicle as a base. Also,self'-pro•pel'ling.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.